About this number
Normalized PSF uses Bala's Table - the Singapore Land Authority differential premium reference for valuing leasehold against freehold. Bala values a fresh 99-year lease at 96% of freehold; the curve drops non-linearly, reaching ~75% at 50 years remaining and ~60% at 30 years.
Below 40 years remaining we stop normalizing because the curve diverges from market reality once CPF withdrawal restrictions and bank LTV cliffs dominate.
A separate 5% adjustment applies to projects whose lease commenced before 2023, reflecting the older strata-area measurement convention (which counted air-con ledges and bay windows).
Source: Singapore Land Authority differential premium reference (Bala's Table).
Transaction prices per square foot
| Project | Dist | Region | Bed | Floor | Area | Price | PSF | 99yr Norm | Date | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| BIRMINGHAM MANSIONS | 11 | CCR | 3 | 01-05 | 1,066 | $2,168,300 | $2,035 | $2,035 | Oct 2025 | Resale |
| BIRMINGHAM MANSIONS | 11 | CCR | 3 | 06-10 | 1,076 | $1,870,000 | $1,737 | $1,737 | Oct 2025 | Resale |
| BIRMINGHAM MANSIONS | 11 | CCR | 3 | 01-05 | 1,076 | $2,020,000 | $1,877 | $1,877 | Oct 2023 | Resale |
| BIRMINGHAM MANSIONS | 11 | CCR | 3 | 06-10 | 1,076 | $1,980,000 | $1,839 | $1,839 | Aug 2023 | Resale |
Normalized via Bala's Table (SLA differential premium curve). Fresh 99yr lease ≈ 96% of freehold; below 40yr we don't normalize.